Scraper.



L. M. ODBN.

sonarn'n.

APPLIIUATIOH mun arm. 1, 1910.

. Patented May 30, 1911.

. awe/whom Zmw" LEWIS ODEN, OF RALEIGH, NORTH CAROLINA.

SCRAPER.

Specification of Letters Patent.

Application filed September 1, 1910.

Patented May 30, 1911. Serial No. 579,999.

To all whom it may concern:

' Be it known that I, LEWIS M. ODEN, a citizen of the United States,residing at Raleigh, in the county of l/Vake and State of NorthCarolina, have invented certain new and useful Improvements in Scrapers,of which the following is a specification.

This invention relates to that class of scrapers which are used forexcavating by means of drag ropes running over guiding pulleys and drawnto and fro by a local engine, and its object is to make the scraperlight, strong, durable, easy to operate and at low cost.

To this end my invention consists in the construction and combination ofparts forming a scraper hereinafter more fully described andparticularly stated in the claims, reference being had to theaccompanying drawings in which- Figure 1 is a top view of my completescraper. Fig. 2 is a side view of the same. Fig. 3 is a diagram showingthe cuts and folds required to form my scraper of sheet metal. Fig. 4-is a plan view of the trunnions. Fig. 5 is a side view of the returndrawing clip, showing adjacent parts in section.

Numeral 6 represents the body of my scraper. I slant the rear lowercorner upward at about 45 in order that it may slide backward withoutpiling up dirt behind it, and that it may more easily return over thedumping roller and never be caught thereon, and I make the rest of therear end to stand practically vertical in order to prevent tough clayand some kinds of earth from sliding right through the scraper over theback. In order to properly shape that lower corner of sheet metal and atthe same time to strengthen and to completely close the rising sidecorners I cut and bend the sheet metal in a peculiar manner described asfollows: To make a scraper 4 feet wide, 4: feet long and 15 inches deeprequires a sheet of metal 6% feet wide and 4. feet and 9% inches long.That is 5?; inches shorter than would be required to make the lowercorner full and square. Draw lines a b 15 inches from each side. Fromthe rear corners c, at an angle of 45 cut to the line a b. On line 0 (1mark the distance d h equal to (Z a, and fold along h 2' at right-anglesto edge 0 g. In the present diagram 7) e and h z are each 9 inches. Online a d fold up the side to a square corner, its original corner at 0now pointing inward. At right-angles with line 0 cl out line Z c. Online I) (Z fold up both parts of angle 1) 0 (Z to a square corner. Alongline (Z (Z fold up the rear end against the 45 edge (2 it, guiding thepoint Z inside and the point 0 outside. On line e a fold forward the topof the back to a vertical position against the side edges in 2', itswing b a I e lapping around the corner against the side as shown inFigs. 1 and 2. Thus the corner (Z c is inclosed by its own bent up leafcl Z c; the vertical corner is inclosed by both folds c b and h z, andthere are two thicknesses of metal to be riveted together both behindand at the side of the vertical corner, and three thicknesses at theside of the slanting corner, insuring the greatest possible strengththat can be derived from the sheet metal, and closing all corners sothat no one can be strained open in service. This makes use of the wholeof the original sheet of metal, but, to render the scraper more ornateand to dispense with useless weight the corners a may be clipped and thecorners g rounded off as shown in full lines. It may, in some cases, beadvantageous to curve upward the edge of the back, as shown in fulllines, to carry more load. If the whole back were slanted backward itwould permit some kinds of earth to slide over it and not fill thesides.

It is common to fasten trunnions to the sides of scrapers to rock onstationary side beams at the dump and support the scraper when tilted tobe emptied, but they are liable to get caught on rocks, roots, etc. inservice and be torn off or bent, usually turning the scraper out ofservice for repairs. To obviate this inconvenience I provide twoseparate trunnions 7, to project through the sides and bent at angles asshown in Fig. 4, to fit into the rear corners and against the back onthe inner side of the scraper, the arms 8 being long enough to extendmore than half way across the back and overlap each other midway. There,a pair of clip bolts 9, with binding straps 10, hold the two bars 8,rigidly bound to the scraper back, the pair of bolts being united as aneye 11, to engage the withdrawing rope. These trunnions, bent into thecorners of the scraper and doubled midway the back, in connection withthe folded and riveted corners, stiffen the scraper so greatly that thebody may be made of comparatively thin material, thus making the scraperlight, to the great advantage of handling in service and lessening thecost.

By loosening the clip bolts the trunnions are liberated to be slippedendwise for removal, and one or both may be replaced in a few minutes ifrequired.

What I believe to be new and desire to secure by Letters Patent isstated in the following claims:

1. In a scraper, a bottom, standing sides, and a back having a slantinglower corner; the sides, the standing back and the slanting cornerea'chhaving a wing passing around the corner and overlapping anotherportion whereby the whole corner is solidly inclosed.

2. In a scraper, a bottom, standing sides and rear end and a slantinglower rear corner; the sides and the standing portion of the rear endeach being folded around the corner at their juncture and secured to theother; at the juncture of the side and the slanting rear corner one ofthese portions having a wing which passes around the corner and overlapsthe other.

3. In a scraper, a bottom; standing sides and back with joined corners;a pair of trunnions, each projecting through a side and bent to fit arear corner and extending more than half way across the back, and a clipbinding the two bars of the trunnions to the back.

4:. In a scraper, a body having standing sides and end; a pair oftrunnions extending through the sides and bent to fit the rear cornersand extending to overlap each other on the inner side of the rear end;aclip binding the overlapping portions to the end, this clip also havingan eye to receive a drag rope, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

LEWIS M. ODEN.

Witnesses J. S. BLAND, DAVID B. ODEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of IEatents.

Washington, D. G.

